Hello Mattress Underground,
I’ve been reading this site for a few days now (I recall a suggestion to spend an hour or so to review the info here… ha!), and by coincidence I can contribute in a small way before asking questions. (my saga to follow elsewhere)
I have a few pictures of IKEA mattress innards that I took today. Not their demo pieces, but the actual mattress opened up. These are their lower end spring mattresses, but may serve as a starting point for anyone considering them. (I am shopping for a 40 lb kid)
SULTAN HURVA
Very basic model (but not the most basic!).
Construction: Cover, Fabric layer, Bonnel springs, Felt layer, polyfoam (web says 1.5 lb/ft³), Cover. No measurements unfortunately, but I don’t think the polyfoam layer was more than 3/4" thk. It is wrapped around slightly in this picture, so looks thicker than it is.
The felt layer seemed to hold the springs together and give a more solid feel than the next model down with the same construction and no felt. This mattress felt firm to me, as if I (~135 lb) was laying on top of it, definitely not in it. A little bit wobbly though. Not too bad, but I definitely felt like I was on top of something.
Concerns:
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The foam looks very thin and cheap. Experience with the no-felt model (Havberg) related to me says the mattress “wore out” (with a jumper) within 3-4 yrs, but now serves as a “good” base for a Costco mattress. How long could one expect this thin, low-density foam to last for a small, non-jumping child?
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No data on the spring gauge. It felt “firm” to me, but do the springs actually wear out? And would they for a small child who “doesn’t” jump on the mattress (…if there’s anybody watching…).
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No wrapping at the side other than the cover. Sitting on the edge (an important consideration for story time) felt soft but acceptable. I could see this compressing over time if the springs get tired.
SULTAN HANESTAD
Sorry for the cropped picture. This at least shows the pocket springs and thickness of the top layer and surrounding foam. Again, the top layer doesn’t look any thicker than 3/4". Website has no information.
This mattress was very soft at the sides - the pocket springs were very soft. It was easily compressible when pressed. The description says it is Firm, but it felt softer than the HALLEN (next). Laying on it, it gave at hips and rear when laying on side and back, and felt a bit precarious, as if I could just ooze off if I wasn’t careful. You wouldn’t want to spend any time reading a story perched on the side of this one for fear you’d slide off.
Again, how long would the springs and foam last?
SULTAN HALLEN
This one felt good (for IKEA?). It “gave” when laid on, but only in the expected spots - hips, rear, etc. When laying on my side, I could feel my hip sunk into the mattress somewhat, but not too much, and my side right next to it felt supported, unlike a linked-spring mattress that would have a wider depression, leaving some of my side unsupported. It felt like it conformed to my profile as needed. Also, the child moves around a lot when sleeping, and so should spread the load. The sides were also acceptable to sit on for story-time. Presumably this floor model has had some use already too.
The IKEA website says here that the foam on top is “High Resilience”, so maybe that explains the feeling of support. This foam looks a little bit thicker too.
Question: Elsewhere on this site, "High Density foam is described as starting around a density of 1.8 lb/cu.ft, and “High Resilience” foam is a notch above, starting at 2.5 lbs. IKEA says that this “HR” foam is 1.5 lb/cu.ft. How can that be? Creative license? A Swedish pound? I guess the HR term isn’t controlled?
If I shop at IKEA, I’m trying to choose between a “firm” (at first) spring mattress in the HURVA, and a “giving” mattress in the HALLEN. All the while trying to correlate the effects of a ~135 lb adult to those of a 40 lb child. The mattress will be placed on a very solid built-up plywood base as part of an older wooden bed.
Sure, the child will grow, but how long before their weight is too much for a low-end IKEA spring? And if they sleep on their stomach sometimes, will that cause a problem?
My sense is that a child is a ways away from not getting enough support from the mattress, but I don’t want to throw away money, regardless of how cheap it is. It may be an experiment…
Hope the pictures are useful for someone. I may go back and get better ones, but I have a whole saga of our own mattress to deal with as well (elsewhere).